1 files changed, 31 insertions, 0 deletions
diff --git a/src/tools/clippy/clippy_lints/src/misc_early/redundant_pattern.rs b/src/tools/clippy/clippy_lints/src/misc_early/redundant_pattern.rs
new file mode 100644
index 000000000..525dbf775
--- /dev/null
+++ b/src/tools/clippy/clippy_lints/src/misc_early/redundant_pattern.rs
@@ -0,0 +1,31 @@
+use clippy_utils::diagnostics::span_lint_and_sugg;
+use rustc_ast::ast::{BindingMode, Mutability, Pat, PatKind};
+use rustc_errors::Applicability;
+use rustc_lint::EarlyContext;
+
+use super::REDUNDANT_PATTERN;
+
+pub(super) fn check(cx: &EarlyContext<'_>, pat: &Pat) {
+    if let PatKind::Ident(left, ident, Some(ref right)) = pat.kind {
+        let left_binding = match left {
+            BindingMode::ByRef(Mutability::Mut) => "ref mut ",
+            BindingMode::ByRef(Mutability::Not) => "ref ",
+            BindingMode::ByValue(..) => "",
+        };
+
+        if let PatKind::Wild = right.kind {
+            span_lint_and_sugg(
+                cx,
+                REDUNDANT_PATTERN,
+                pat.span,
+                &format!(
+                    "the `{} @ _` pattern can be written as just `{}`",
+                    ident.name, ident.name,
+                ),
+                "try",
+                format!("{}{}", left_binding, ident.name),
+                Applicability::MachineApplicable,
+            );
+        }
+    }
+}